Which of the following statements about learning and behavior is correct?

A) Operant conditioning involves associating a behavior with a reward or punishment.

B) Associative learning involves linking one stimulus with another.

C) Behavior can be modified by learning, but some apparent learning is due to maturation.

D) Imprinting is a learned behavior with an innate component acquired during a sensitive period.

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#Question id: 4150

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Posttranslational glycosylation of proteins is inhibited specifically by:

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#Question id: 4153

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Ubiquitin-mediated protein degradation is a complex process, and many of the signals remain unknown.  One known signal involves recognition of amino acids in a processed protein that are either stabilizing (Ala, Gly, Met, Ser, etc.) or destabilizing (Arg, Asp, Leu, Lys, Phe, etc.), and are located at:

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#Question id: 4154

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How many possible codons (of normal size) are possible using the bases found in DNA?

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#Question id: 4155

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Of all the possible triplet codons, __ do not code for an amino acid.

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#Question id: 4156

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The reading frame of DNA is fixed by

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#Question id: 4158

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What is a reasonable number of nucleotides in a tRNA molecule?